Lifepo4 Prismatic Cells

Lifepo4 Prismatic Cells


Most of the Lifepo4 prismatic cells, packaged with aluminum alloy and stainless steel, are wound or laminated inside the battery. In this way, the protective effect on batteries of such prismatic cells is better than that on soft pack lithium batteries and that on Lifepo4 cylindrical batteries.

Lifepo4 prismatic cells can be customized according to the size of the product, so there are many different models of Lifepo4 prismatic-cell battery in the market, which makes it difficult to unify the production process, resulting in low automation level and huge monomer differences. In addition, the life cycle of the lifepo4 battery pack may be shorter than that of a single prismatic lithium cell.

The differences between prismatic and cylindrical batteries:
1. Discharge plateau: Theoretically, the discharge plateaus of them are supposed to be the same in that both prismatic batteries and cylindrical batteries have identical anode material, cathode material and electrolyte. However, the discharge plateau of the prismatic battery is slightly higher because the internal resistance of it is a little bit stronger.

2. Product quality: The technology of manufacturing cylindrical lithium batteries is maturer than that of prismatic batteries so it is more likely to make the common secondary slitting for pole pieces impeccable. Besides, the winding process of cylindrical lithium batteries is more developed than the lamination process; the latter is still semi-manual, unavoidably exerting an adverse impact on the quality of the battery.

3. Tab welding: It is easier to tab-weld cylindrical lithium battery than the prismatic lithium battery. 

4. PACK in groups: The PACK solution of  cylindrical battery is simpler and the heat dissipation effect is good, while the problem of heat dissipation should be highlighted when packing prismatic lithium battery.